. The anatomical record. Anatomy; Anatomy. PARAPHYSIS AND PINEAL REGION OF SNAKE 631. Fig. 40 Represents a transverse section through the stalk of the epiphysis of an embryo having a length of 90 mm. The section was accidentally broken across the stalk. X 50. Fig. 41 Represents a sagittal section through the pineal region of an embryo having a length of 100 mm., showing the large blood vessel dorsal to the epiphysis. X 50. Each ganglion habenulae forms a dorsal projection on the diencephalon in the region of the posterior end of the paraphysis. These two ganglia are separated dorsally by the m
. The anatomical record. Anatomy; Anatomy. PARAPHYSIS AND PINEAL REGION OF SNAKE 631. Fig. 40 Represents a transverse section through the stalk of the epiphysis of an embryo having a length of 90 mm. The section was accidentally broken across the stalk. X 50. Fig. 41 Represents a sagittal section through the pineal region of an embryo having a length of 100 mm., showing the large blood vessel dorsal to the epiphysis. X 50. Each ganglion habenulae forms a dorsal projection on the diencephalon in the region of the posterior end of the paraphysis. These two ganglia are separated dorsally by the much folded roof of the diencephalon making up the choroid plexus of the third ventricle. In one specimen the superior commissure appar- ently cuts off a portion of the roof of the diencephalon between the two ganglia so that there is a short pocket formed extending posteriori}' above the commissure (fig. 38). DISCUSSION The present study on the development of the parietal region in the garter snake has thrown light upon several matters which have been the subject of much debate. First of all, there can be little doubt left regarding the pres- ence of a parietal organ in certain stages of the ophidians. Either. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bardeen, Charles Russell, 1871-1935, ed; Boyden, Edward A. (Edward Allen), 1886-1976; Bremer, John Lewis, 1874- ed; Hardesty, Irving, b. 1866, ed; American Association of Anatomists; American Society of Zoologists; Wistar Institute of Anatomy and Biology. [New York, etc. ] A. R. Liss [etc. ]
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1906
